I had to Google SmartWater just to find out what it was.Hey Rocky,
My first trip over I will doing the tourist thing and staying in some resort on the east end of the island. After that, I will be there quit a bit and will figure out how to survive then.
My biggest problem is that I can't drink water, except SmartWater. And then I can handle caffine free, sugar free soda also.
Am I in trouble when I get there?
I highly doubt it will be available at an AI resort in the DR, and might not even be sold in the country.
There is a product sold in pharmacies under various names, that might be similar.
I have one here called "Electrolit".
It sounds similar to your SmartWater, only is flavoured. (apple/orange/etc)
I just hope you can find something out that way that will suit your needs.
Either that, or you're going to have to bring a case of your SmartWater with you.